//
// PluginLimiter.c - MrsWatson
// Copyright (c) 2016 Teragon Audio. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//

#include "PluginLimiter.h"

#include "audio/SampleBuffer.h"
#include "logging/EventLogger.h"

const char *kInternalPluginLimiterName = INTERNAL_PLUGIN_PREFIX "limiter";

static void _pluginLimiterEmpty(void *pluginPtr) {
  // Nothing to do here
}

static boolByte _pluginLimiterOpen(void *pluginPtr) { return true; }

static void _pluginLimiterDisplayInfo(void *pluginPtr) {
  logInfo("Information for Internal plugin '%s'", kInternalPluginLimiterName);
  logInfo("Type: effect, parameters: none");
  logInfo("Description: a brickwall limiter effect");
}

static int _pluginLimiterGetSetting(void *pluginPtr,
                                    PluginSetting pluginSetting) {
  switch (pluginSetting) {
  case PLUGIN_SETTING_TAIL_TIME_IN_MS:
    return 0;

  case PLUGIN_NUM_INPUTS:
    return 2;

  case PLUGIN_NUM_OUTPUTS:
    return 2;

  default:
    return 0;
  }
}

static void _pluginLimiterProcessAudio(void *pluginPtr, SampleBuffer inputs,
                                       SampleBuffer outputs) {
  unsigned long channel, sample;

  sampleBufferCopyAndMapChannels(outputs, inputs);

  for (channel = 0; channel < outputs->numChannels; ++channel) {
    for (sample = 0; sample < outputs->blocksize; ++sample) {
      if (outputs->samples[channel][sample] > 1.0f) {
        outputs->samples[channel][sample] = 1.0f;
      } else if (outputs->samples[channel][sample] < -1.0f) {
        outputs->samples[channel][sample] = -1.0f;
      }
    }
  }
}

static void _pluginLimiterProcessMidiEvents(void *pluginPtr,
                                            LinkedList midiEvents) {
  // Nothing to do here
}

static boolByte _pluginLimiterSetParameter(void *pluginPtr, unsigned int i,
                                           float value) {
  return false;
}

Plugin newPluginLimiter(const CharString pluginName) {
  Plugin plugin = _newPlugin(PLUGIN_TYPE_INTERNAL, PLUGIN_TYPE_EFFECT);
  charStringCopy(plugin->pluginName, pluginName);
  charStringCopyCString(plugin->pluginLocation, "Internal");

  plugin->openPlugin = _pluginLimiterOpen;
  plugin->displayInfo = _pluginLimiterDisplayInfo;
  plugin->getSetting = _pluginLimiterGetSetting;
  plugin->prepareForProcessing = _pluginLimiterEmpty;
  plugin->showEditor = _pluginLimiterEmpty;
  plugin->processAudio = _pluginLimiterProcessAudio;
  plugin->processMidiEvents = _pluginLimiterProcessMidiEvents;
  plugin->setParameter = _pluginLimiterSetParameter;
  plugin->closePlugin = _pluginLimiterEmpty;
  plugin->freePluginData = _pluginLimiterEmpty;

  plugin->extraData = NULL;
  return plugin;
}
